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Submitted on: 30 September 2007.
Revised on: 10 November 2007.
Accepted on: 05 January 2008.
___________________AIRCRAFT ENGINEERING AND AEROSPACE TECHNOLOGY
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Submitted on: 21 May 2012.
Revised on: 11 June 2012.
Accepted on: 03 July 2012.
___________________AIRCRAFT ENGINEERING AND AEROSPACE TECHNOLOGY
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Submitted on: 08 October 2011.
Revised on: 20 November 2011.
Accepted on: 04 December 2011.
___________________AIRCRAFT ENGINEERING AND AEROSPACE TECHNOLOGY
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